/**
 * Copyright 2010 Tristan Slominski
 *
 * Licensed under the MIT License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.opensource.org/licenses/mit-license.php
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.mindash.handlebars.client.presenters.impl;

import java.util.HashMap;
import java.util.Map;

import com.google.inject.Inject;
import com.google.inject.Provider;
import com.mindash.handlebars.client.presenters.ParentPresenter;
import com.mindash.handlebars.client.presenters.Presenter;
import com.mindash.handlebars.client.services.EventBus;
import com.mindash.handlebars.client.views.View;

/**
 * @author Tristan Slominski
 * 
 */
public abstract class DefaultParentPresenterImpl<V extends View> extends
    DefaultPresenterImpl<V> implements ParentPresenter {

  /* variables */
  private Map<String, Presenter> childPresenters =
      new HashMap<String, Presenter>();

  @Inject
  public DefaultParentPresenterImpl(EventBus eventBus, Provider<V> viewProvider) {
    super(eventBus, viewProvider);
  }

  @SuppressWarnings("unchecked")
  @Override
  public <T extends Presenter> T getChildPresenter(String presenterName,
      Provider<T> presenterProvider) {
    Presenter presenter = getChildPresenters().get(presenterName);
    if (presenter == null) {
      getChildPresenters().put(presenterName, presenterProvider.get());
      presenter = getChildPresenters().get(presenterName);
    }
    return (T) presenter;
  }

  @Override
  public Map<String, Presenter> getChildPresenters() {
    return childPresenters;
  }

}
